In case you are wondering what this is.
1/ If you lock CRV tokens in the Curve DAO, you get back veCRV tokens. The longer you lock, the more veCRV tokens you get. Those veCRV tokens let you claim a portion of the admin fees generated by *all* Curve pools
3/ The "38% more" above comes from the mutually beneficial relationship between yveCRV and the other CRV auto-farm yearn vaults like y3crv.
The yveCRV locks CRV to boost returns of the auto-farms, and the auto-farms lock some CRV which gives more veCRV to the yveCRV vault
4/ But in the yveCRV vault, your principal is locked up...forever.
That's where the WETH-yveCRV pool comes in. At any point, you can swap your yveCRV for WETH and get your principal back (assuming market price for yveCRV stays near CRV)
5/ And at the moment, the Sushi team has added some ridiculously high incentives in the form of SUSHI token rewards for providing initial liquidity in that pool